public static unsafe GraphicsDevice CreateDefaultOpenGLGraphicsDevice(
GraphicsDeviceOptions options,
Sdl2Window window,
GraphicsBackend backend)
{
Sdl2Native.SDL_ClearError();
IntPtr sdlHandle = window.SdlWindowHandle;
SDL_SysWMinfo sysWmInfo;
Sdl2Native.SDL_GetVersion(&sysWmInfo.version);
Sdl2Native.SDL_GetWMWindowInfo(sdlHandle, &sysWmInfo);
SetSDLGLContextAttributes(options, backend);
IntPtr contextHandle = Sdl2Native.SDL_GL_CreateContext(sdlHandle);
byte * error = Sdl2Native.SDL_GetError();
if (error != null)
{
string errorString = GetString(error);
if (!string.IsNullOrEmpty(errorString))
{
throw new VeldridException(
$"Unable to create OpenGL Context: \"{errorString}\". This may indicate that the system does not support the requested OpenGL profile, version, or Swapchain format.");
}
}
int actualDepthSize;
int result = Sdl2Native.SDL_GL_GetAttribute(SDL_GLAttribute.DepthSize, &actualDepthSize);
int actualStencilSize;
result = Sdl2Native.SDL_GL_GetAttribute(SDL_GLAttribute.StencilSize, &actualStencilSize);
result = Sdl2Native.SDL_GL_SetSwapInterval(options.SyncToVerticalBlank ? 1 : 0);
OpenGL.OpenGLPlatformInfo platformInfo = new OpenGL.OpenGLPlatformInfo(
contextHandle,
Sdl2Native.SDL_GL_GetProcAddress,
context => Sdl2Native.SDL_GL_MakeCurrent(sdlHandle, context),
() => Sdl2Native.SDL_GL_GetCurrentContext(),
() => Sdl2Native.SDL_GL_MakeCurrent(new SDL_Window(IntPtr.Zero), IntPtr.Zero),
Sdl2Native.SDL_GL_DeleteContext,
() => Sdl2Native.SDL_GL_SwapWindow(sdlHandle),
sync => Sdl2Native.SDL_GL_SetSwapInterval(sync ? 1 : 0));
return(GraphicsDevice.CreateOpenGL(
options,
platformInfo,
(uint)window.Width,
(uint)window.Height));
}
public static GraphicsDevice CreateDefaultOpenGLGraphicsDevice(GraphicsDeviceOptions options, Sdl2Window window)
{
IntPtr sdlHandle = window.SdlWindowHandle;
if (options.Debug)
{
Sdl2Native.SDL_GL_SetAttribute(SDL_GLAttribute.ContextFlags, (int)SDL_GLContextFlag.Debug);
}
Sdl2Native.SDL_GL_SetAttribute(SDL_GLAttribute.ContextProfileMask, (int)SDL_GLProfile.Core);
Sdl2Native.SDL_GL_SetAttribute(SDL_GLAttribute.ContextMajorVersion, 4);
Sdl2Native.SDL_GL_SetAttribute(SDL_GLAttribute.ContextMinorVersion, 0);
int depthBits = 0;
if (options.SwapchainDepthFormat.HasValue)
{
switch (options.SwapchainDepthFormat)
{
case PixelFormat.R16_UNorm:
depthBits = 16;
break;
case PixelFormat.R32_Float:
depthBits = 32;
break;
default:
throw new VeldridException("Invalid depth format: " + options.SwapchainDepthFormat.Value);
}
}
Sdl2Native.SDL_GL_SetAttribute(SDL_GLAttribute.DepthSize, depthBits);
IntPtr contextHandle = Sdl2Native.SDL_GL_CreateContext(sdlHandle);
if (contextHandle == IntPtr.Zero)
{
unsafe
{
byte * error = Sdl2Native.SDL_GetError();
string errorString = GetString(error);
throw new VeldridException("Unable to create GL Context: " + errorString);
}
}
int result = Sdl2Native.SDL_GL_SetSwapInterval(options.SyncToVerticalBlank ? 1 : 0);
OpenGLPlatformInfo platformInfo = new OpenGLPlatformInfo(
contextHandle,
Sdl2Native.SDL_GL_GetProcAddress,
context => Sdl2Native.SDL_GL_MakeCurrent(sdlHandle, context),
() => Sdl2Native.SDL_GL_GetCurrentContext(),
() => Sdl2Native.SDL_GL_MakeCurrent(new SDL_Window(IntPtr.Zero), IntPtr.Zero),
Sdl2Native.SDL_GL_DeleteContext,
() => Sdl2Native.SDL_GL_SwapWindow(sdlHandle),
sync => Sdl2Native.SDL_GL_SetSwapInterval(sync ? 1 : 0));
return(GraphicsDevice.CreateOpenGL(
options,
platformInfo,
(uint)window.Width,
(uint)window.Height));
}
